flub

An error; a mistake in the performance of an action.

1962 November 6, Richard Nixon, “Gentlemen, this is my last press conference”, 2008, Rick Perlstein (editor), Richard Nixon: Speeches, Writings, Documents, page 111, I made a talk on television, a talk in which I made a flub—one of the few that I make, not because I′m so good on television but because I′ve been doing it a long time. I made a flub in which I said I was running for governor of the United States.

A flub can be a slight cinematic slip-up or a major gaffe.

A fold of fat.

To goof, fumble, or err in the performance of an action.

‘Stage fright? So? What are you babbling ′bout? You′re mad as a snake!’ ‘Ever since I was a kid. I was in the Christmas Pageant one year and flubbed my line.’ ‘What was your line?’ ‘I told you I flubbed it!’ he mouthed these words hysterically.

The actor that detained her had one line in that particular scene and flubbed it. And then flubbed it again...and again. And again, all the while assuring the director and the crew that he ‘knew his lines’ and then flubbed them again.